Sand washing and saving machine.



PATENTED JAN. 10, 1905.

w. B. MARTIN.- SAND WASHING AND SAVING MACHINE APPLICATION TILED MAY 28, 1904.

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ATTORNEY.

UNITE-D STATES Patented January 10, 1905 PATENT OFFICE.

WILLIAM B. MARTIN, OF SEATTLE, WASHINGTON.

SAND WASHING AND SAVING MACHINE- SPECIFICATION forming part of Letters Patent No. 779,615, dated January 10, 1905.

Application fiIed m 22, 1904. Serial No. 210,210.

ington, have invented certain new and useful Improvements in Sand \Vashing and Saving Machines, of which the following is a specification, reference being had therein to the accompanying-d'rawing.

This invention relates to sand Washing and saving devices.

The object of the invention is to provide an apparatus of simple and inexpensive construction and one which can be easily and economically operated for separating gravel, dirt, and other substances from sand intended for building and other purposes where it is required, or at least. advantageous, to use only clean sand. I attain these results by the apparatus hereinafter described, and illustrated in the accompanying drawing, which is a vertieallongitudinal section of a machine embodying my invention.

In thedrawing, 2 represents tank or receptacle. preferably box-shaped, and which is supplied with water anchthe material carrying the sand through aslulceway or chute?) entering the tank at one end and in proximity of its top. Upon the opposite end of the tank and also in proximity of the top is an outlet 4, through which the lighter or refuse particles are delivered into a discharge-chute 5.

interposed within the chute 4 is a screen or grizzly 6, comprised, preferably, of a series of transversely-disposed bars which are inclined toward one side for the purpose of screening the material and discharging rocks, lumps of clay, &c., through an outlet 7, provided in the chute.

Positioned within the tank and intermediate the chutes 3 and 5 is an inclined deflectorplate 8, which extends entirely across the tank, but is of such length as to provide openings 9 and 9, through which the sand gravitates into the space therebeneath. A watersupply pipe 10 projects upwardly into the tank, and the part interiorly thereof is perforated, as

ficiently clean for ordinary purposes.

. slide-cleats15.

The operation of'the invention is as follows: The material being conducted, by means of water, through the supply-chute is delivered with some force against the deflector-plate,

where the lighter dirt particles are separated and borne by the deflected current of water into the disehargechute. The remainder of the material, mostly sand, passes through the interstices 9 or 9"into the space below, and, unless the material isvery dirty, will be suf- Should it be desired, however, to make the sand extremely clean, as demanded for certain uses, then water is admitted under pressure into the receptacle through said perforated pipe, which causes the ebullition 'of the collected material to thoroughly wash the same and further segregate the foreign substances from the sand, which if it be of less specific weight 75 flows OH with the water through opening 9 to the discharge-chute, or if heavier it settles in the bottom of the tank below the level of the apertures 13. When the sand is deemed to be clean enough, it is withdrawn, accompanied with some water, through said apertures upon opening the gates thereof.

The invention is well adapted for the purposes for which intended and marks a decided advance in the art.

Having described my invention, what 1 claim as new, and desire to secure by Letters Patent, is

The herein-described apparatus,eom prising a tank having discharge-openings in its walls near the bottom thereof, a supply-chute discharging into the upper portion of the tank, a screen in the supply-chute, a discharge-chute leading from the tank opposite to the supply In testimony whereof I affix my signature in presence of two Witnesses.

- XYILLIAM B. lllAR'llN.

\Vitnesses: PIERRE BARNms, Hnxm' S. News.

chute, an inclined deflector-plate within the tank and wholly below the supply and overllow-disclml'ge levels and of such length as to substantially close the top of the tank and l leave only narrow openings between the walls l of the tank, and a Water-pipe projecting interim'ly of the tank below the deflector-plate. l 

